INTERNAL ENERGY

[WellWIshER]

what is the difference in magnitudes between specific heat of vapourization and specific heat of fusion

in terms of thermodynamics? (5)



when should we use da law of thermodynamics and da defination of internal energy i am really confused

wt happens to da internal energy if we melt a substance and when we boil it?????


thanx :O:

 

[WellWIshER]

anyone????

 

[beacon_of_light]

The magnitude of specific heat of vapourisation is higher than heat of fusion. vapourisation involves large volume changes whereas their are negligible volume changes during fusion. So more heat is required to do work against the atmosphere in vapourisation...
First Law of thermodynamics to be stated when asked and when asked about the definition of internal energy ...give the definition...

Internal energy is the sum of kinetic and potential energies associated with molecules moving randomly...during melting and boiling since the temperature remains constant, Kinetic energy component of internal energy remains same, whereas the separation b/w molecules increases resulting in an increase in potential energy ..so internal energy increases!!!

 

[mfby2ksjsoft]

Internal Energy is stated as the summation of all microscopic forms of energy. It is defined as the sum of kinetic and potential energy of the molecule since it is related to the molecular structure and molecular activity.

internal energy
Thermodynamics
electronics